Forced expiratory volume (FEV) is the volume of exhaled air and is related to lung size as well as lung function. It is typically lower in persons with impaired lung function due to disease. A regression of height (in inches) on FEV (in liters) showed a nonlinear pattern. Therefore, height was regressed on log(FEV) (natural log) and the residual plot showed a much improved fit. The intercept a and slope b from the regression of height on log(FEV) are a = -2.2 and b = 0.06. A 5-foot-tall person is predicted to have a lung volume of:
A)1.4 liters.
B)4.1 liters.
C)2.2 liters.
D)0.06 liters.

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The Answer of Forced expiratory volume (FEV) is the volume of exhaled air and is related to lung size as well as lung function. It is typically lower in persons with impaired lung function due to disease. A regression of height (in inches) on FEV (in liters) showed a nonlinear pattern. Therefore, height was regressed on log(FEV) (natural log) and the residual plot showed a much improved fit. The intercept a and slope b from the regression of height on log(FEV) are a = -2.2 and b = 0.06. A 5-foot-tall person is predicted to have a lung volume of:
A)1.4 liters.
B)4.1 liters.
C)2.2 liters.
D)0.06 liters.

Forced Expiratory Volume (FEV) Is the Volume of Exhaled Air